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Event Horizon Telescope

Imagine a giant eye in the sky that can see black holes! The Event Horizon Telescope is like that!

Images

Montage of the Event Horizon Telescope observatories (day) (eso2208-eht-mwf)

Montage of the Event Horizon Telescope observatories (day) (eso2208-eht-mwf)

openverse
Event Horizon Telescope Q&A (HJK 5004)
File:Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope Fig4b.png
File:Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope Fig2b.png
Event Horizon Telescope and Apollo 16
File:Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope Fig1a.png
The Event Horizon Telescope and Global mm-VLBI Array on the Earth
File:Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope Fig1b.png
Montage of the Event Horizon Telescope observatories (night) (eso2208-eht-mwg)
The Event Horizon Telescope and Global mm-VLBI Array on the Earth (annotated) (eht with title 30march)
File:Distribution of Event Horizon Telescope en.tif
Montage of the Event Horizon Telescope observatories (day) (eso2208-eht-mwf)

Key Facts

What It Is
A global network of radio telescopes working together as one giant telescope.
What It Sees
The 'shadow' or event horizon of supermassive black holes.
First Image Date
April 10, 2019.
Fun Fact
The telescopes are so far apart, they have to sync their clocks using super-accurate atomic clocks!

Meet the Super-Spy Telescope!

The Event Horizon Telescope isn't just one telescope, it's like a team of telescopes all over the world working together! They use a special trick called 'very-long-baseline interferometry' to act like one giant telescope as big as Earth! This lets them see tiny things far, far away in space.

Their main job is to take pictures of black holes, which are super mysterious and powerful objects in space that even light can't escape from!

How Do They See the Unseeable?

These telescopes are like super-powered eyes that look for radio waves, which are a type of light we can't see. They point at black holes and collect all the radio waves. Then, supercomputers put all the information together, like a giant puzzle.

It's like taking a picture with thousands of cameras all over the world at the same time and then combining them to make one super-clear image. This lets them see things as small as a donut hole from across the country!

First Pictures of Black Holes!

For a long time, scientists only knew black holes were there because of how they pulled things in. But the Event Horizon Telescope changed everything! In 2019, they showed the world the first-ever picture of a black hole's shadow.

It looked like a fiery orange ring around a dark circle. Later, they even took a picture of the black hole in the middle of our own Milky Way galaxy! These pictures are like finding clues to understand the universe's biggest mysteries.

Why Are Black Holes So Cool?

Black holes are amazing because they are so powerful. They are like cosmic vacuum cleaners, but way stronger! The ones the Event Horizon Telescope looks at are supermassive, meaning they are millions or even billions of times heavier than our Sun.

They sit at the center of galaxies, including our own Milky Way. Seeing them helps scientists understand how galaxies grow and how gravity works in the most extreme places.

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Based on content from Wikipedia · Licensed under CC BY-SA 4.0